And McDermott said: "Listen I know the player and he’s a player who, if I could have done the deal, I would have taken him to Reading."
Peterborough chairman Darragh MacAnthony seemed to suggest that Reading had pulled out on a deal as their owner wanted to sign a Polish striker instead on Twitter.
HITC reported on MacAnthony’s comments yesterday, and McDermott would not confirm whether the tweets were about his side.
Bit of Info,fee agreed with another club last week but foreign owner pulled plug as wanted his manager to sign a Polish Striker.Madness imo!— Darragh MacAnthony (@DMAC102) January 19, 2016
"Ask him," McDermott said when questioned whether the tweets were about Reading.
Washington has been handed the number nine shirt at QPR, and he has signed a three-and-a-half year deal at Loftus Road.
The former Newport County front man could make his debut for Rangers in their match against Wolverhampton Wanderers on Saturday.